So is peanut oil a laxative?

Yeah, the implications alone veer into TMI, but I cannot find a reputable source that corroborates this (I even google-searched SDMB).

See, thing is, I bought some “natural style” PB (in different 16 oz jars), y’know with the separation and all. As much as I tried to mix it, I couldn’t get a uniform consistency without making a damn mess, so the first helpings were extra saturated with the oil. Since the remainder didn’t… cause distress, I didn’t make a mental correlation. But come the second jar… yeah.

Or did I just buy some bad PB?

A large enough dose of any oil (peanut, canola, fish, whatever) can loosen up your insides.

Thisseems like a pretty reputable cite.

I used to eat a lot of french fries and never felt that way. I’ve had the separation (of the peanut butter, not stool) issue with a lot of natural peanut butter.